No questions found
Each rectangle shows the arrangement of particles in each of the three states of matter.
X, Y and Z represent the processes needed to change from one state to another.
What are the processes X, Y and Z?
550
525
599
Which piece of apparatus is used to measure 25.0 cm$^3$ of aqueous sodium hydroxide?
566
527
525
Which process is used to produce drinking water from sea water?
554
586
523
The diagram shows the electronic structure of a particle with a nucleon number (mass number) of 40.
The table shows the suggestions that three students, 1, 2, and 3, made to identify the particle.
[Table_1]
Which students are correct?
528
591
573
The Group I element sodium forms an ionic bond with the Group VII element fluorine.
Which two ions are produced?
551
515
528
The electronic structures of two atoms, P and Q, are shown. P and Q combine together to form a compound. What is the type of bonding in the compound and what is the formula of the compound? [Table_1]
523
510
587
Graphite is a macromolecule. Which statements about graphite are correct?
1. Carbon atoms form four covalent bonds with neighbouring atoms.
2. There are free electrons between layers of carbon atoms.
3. Graphite is a useful lubricant.
4. Graphite is a good conductor of electricity.
531
567
597
Aluminium oxide has the formula $Al_2O_3$.
Which statement about aluminium oxide is correct?
523
509
505
Dilute sulfuric acid is electrolysed using carbon electrodes.
Which row shows the products formed at each electrode?
[Table_1]
537
595
535
Which fuel does not rely on combustion to release energy?
513
532
569
The energy level diagram shows the energy of the reactants and products in a chemical reaction.
Which row correctly describes the energy change and the type of reaction shown?
[Table_1]
556
585
537
Which list contains only chemical changes?
565
571
597
Which row shows the changes that all increase the rate of a chemical reaction?
[Table 1]
558
570
578
When heated strongly, silicon(IV) oxide reacts with carbon.
\( \text{SiO}_2 + 2\text{C} \rightarrow \text{Si} + 2\text{CO} \)
Which term describes what happens to silicon(IV) oxide?
528
593
588
The graph shows how the pH of a solution changes as an acid is added to an alkali.
acid + alkali → salt + water
Which letter represents the area of the graph where both acid and salt are present?
592
542
575
Element G is a metal in Group I of the Periodic Table and element H is a non-metal in Group VII. Both of these elements form oxides.
Which statement about their oxides is correct?
573
511
543
The apparatus shown is used to prepare aqueous copper(II) sulfate.
What are X and Y?
576
527
564
An aqueous solution of a compound M is tested. The results are shown.
• It gave a lilac colour in a flame test.
• It produced a white precipitate when tested with acidified barium nitrate.
What is M?
510
589
537
The character of the elements and charges on the ions of the elements change across the Periodic Table.
Which row describes the elements on the left of the table and the elements on the right?
[Table_1]
537
586
582
Which statement about Group I and Group VII elements is correct?
588
515
522
The properties of the element titanium, Ti, can be predicted from its position in the Periodic Table.
Which row identifies the properties of titanium?
[Table_1]
504
575
587
Which diagram shows a mixture of noble gases?
516
591
514
Which property is shown by all metals?
543
514
564
The reactions of four metals, W, X, Y and Z, are shown.
[Table_1]
What is the order of reactivity for metals W, X, Y and Z?
584
518
590
Molten iron from the blast furnace contains impurities.
The process of turning the impure iron into steel involves blowing oxygen into the molten iron and adding calcium oxide.
What are the reasons for blowing in oxygen and adding calcium oxide?
[Table_1]
590
500
532
Which statement about mild steel explains why it is a good choice for car bodies?
509
587
545
Which statement about pure water is not correct?
543
563
598
Which compounds both contribute to 'acid rain'?
561
531
500
The diagrams show experiments to investigate rusting of iron nails.
In which test-tubes do the nails rust?
588
521
575
Which bag is not suitable for use as a fertiliser?
598
563
576
X is a colourless greenhouse gas.
It is a waste product from digestion in animals.
It is generally unreactive, but it can be burnt.
What is X?
558
572
512
The list shows four methods that were suggested for the formation of carbon dioxide.
1. cracking methane using steam
2. action of heat on a carbonate
3. complete combustion of methane
4. reaction of a carbonate with oxygen
Which methods would result in the production of carbon dioxide?
516
500
544
A student suggests three uses of calcium carbonate (limestone).
1 manufacture of cement
2 manufacture of iron
3 treating alkaline soils
Which suggestions are correct?
522
523
558
Which list shows the fractions obtained from distilling petroleum, in order of increasing boiling point?
546
560
550
The structures of four compounds are shown.
Which compounds are members of the same homologous series?
557
533
500
Increasing the number of atoms in one molecule of a hydrocarbon increases the amount of energy released when it burns. What is the correct order?
[Table_1]
566
503
519
Which statement about alcohols is correct?
501
581
505
An organic compound, P, reacts with zinc to produce a gas, Q.
What are P and Q?
[Table_1]
504
500
552
Which substances are natural polymers?
1. proteins
2. carbohydrates
3. nylon
4. poly(ethene)
543
508
506
